package org.ws.kardex.servlets.inventory;

import com.google.appengine.api.datastore.Key;
import com.google.appengine.api.datastore.KeyFactory;
import java.io.IOException;
import java.io.PrintWriter;
import javax.jdo.PersistenceManager;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.ws.kardex.gae.PMF;
import org.ws.kardex.model.Inventory;

/**
 *
 * @author gerardino
 */
public class Users extends HttpServlet {

    private static final String P_INVENTORY_ID = "iid";
    private static final String P_CONTACT_ID = "cid";
    
    /** 
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        response.setContentType("text/html;charset=UTF-8");
        
        PrintWriter out = response.getWriter();
        PersistenceManager pm = PMF.pm;
        
        Long k = Long.parseLong(request.getParameter(P_INVENTORY_ID));
        if (k == null)
            System.out.println("No es posible parsear " + request.getParameter(P_INVENTORY_ID));
        Key key = KeyFactory.createKey(Inventory.class.getSimpleName(), k);
        Inventory i = pm.getObjectById(Inventory.class, key);
        
        String user = request.getParameter(P_CONTACT_ID);
        if (user != null){
            for(int j = 0; j < i.getUsers().size(); j++ ){
                String u = i.getUsers().get(j);
                if (user.equals(u)){
                    i.getUsers().remove(j);
                    break;
                }
            }
        }
        
        try {
            if (i.getUsers().isEmpty()){
                out.println("No hay usuarios con acceso a este inventario.");
            } else {
                out.println("Haga click en un usuario para eliminarlo del listado.<br>");
                for(String u : i.getUsers()){
                    out.println("\t"
                            + " <button onClick=\"loadUsers("+ i.getId().getId() +", "+"'" + u +"')\">"
                            + u
                            + "</button><br>");
                }
            }
            
        } finally {            
            out.close();
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">
    /** 
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
     */
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /** 
     * Returns a short description of the servlet.
     * @return a String containing servlet description
     */
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}
